Self-locking device



H. VISSERING SELF LOCKING DEVICE Aug. 9 1927.

Filed March '26 1920 5 sheets-sheet 2 E y; ffy

Aug. 9, 1927.

H. VISSERING SELF LOCKING DEVICE Filed March 26. 1920 5 Sheets-Sheet 3 .appneefien mee Maren .26, 19am serrer".Nojeeafma;

Y present invention relates in general to self-locking devices andmore particularly to aV device vof the character descr-ibedliaving means whereby its movement may be stopped witliina very narrow range o;t"predet erf mined limits. Y Y "The principal v ention are the f prevision-v of an lmproved device, of the nature referred to, cliaracterf ized by the provisionjofv separate parts so arrangedthat while theyl may lbe' freely moved in' unison,' nevertheless any f' slight movement impartedto one otlrem 'without j tively movable" elements Y 'i "at the same time imparting to theotlier "thereofwillnot' only cause an immediate /W'edging' orfbinding ofthe kv'parts'fluit also movement fofthedevice' as av whole relatively tothe structure to which it is applied; @the provision ,olf an improved device Vof the lrind referred-to A characterized gener-y ally' by the. 'embodimentfthereinfof relaliavingjfeccentric 4 axes; the provisionofsucliraidevice wherein one of the elements `includes separate 'but relatively immovable'parts; the provision oi 'lsucli a device 'wherein.tlie movable members for tliepresent purposes f adaptedlor quick -v andi convenient' operation by? an ordinary j "i "wrench'; togetlierfwitli f'lfurther and adf ditional objects as mayliereinafter'-appear.

llliile devicee of the lchajra ctferfmferred to :have afwide iield outilityginasmuch as they j are vparticularly useful asfplugs for lubricat-- ing de'v1ces,.suchv as grease 'cups'. or' oil holes jv- A.for metal parts whiclijare subjected to such' vibration or. Vshock as tend to loosen Lthem and eventuallygtocauSethem'toffallffout 'or' position; witlipossiblefensuantlossof lubrivcantor.entranceof foreign and'abrasiye matter, I have .illustrated in tlieacco'rripanying 't drawings'jthe embodiment of my `improved self-locking device in the form of a'grea'sef `cup plug adapted for application to the wrist l pin of the l`c`onnecti Iig rod 'of a railwa'yloco- Referring now :more particularly) tothe drawings, it will be observed accompanying thatf objects 'of `my present `infied formloftlie'fdeviceof Figure 'in Verticalisetion'g-'i l' 1 51' Figures 5a-rid `6',f re`spectively, aplanview and v a centraltransverse sectional view. lof the adaptation lof ,my y'present improvements s to 'taken on'thelineS-S 'of Figure 7;',

a Figure-llis asecti'onallview'oftliedevice are provlded'with complemental 'surface enjgagmg portionsswhwh; ,temememovei Figure 9L v v 'mentor y ll YReferring," urejs 1, 2 and 3 of thefdrawingm' itwill be observed? that 'I haveor purposes of:V illustration of the Vembodiment and use-10ft my :in-V `v'ention",11,indicatedV a devicefto be'lubricated fr fwlereinforexfample there-'may loe-employed. f ai#crarilffliaving-an'erilargedend{10,vsurr f rounding a1 wristpim 11, "with a renewable 'sleev`e,` 212,101r`fant` HARRY'vIssartrNefcr Kmir;'Lvv'orvlrrA VVVFigure 3l is an enlarged sectional view of "l Y viewand a central transversesec'tional view/ Figures 9 xand lO'are; respectively,fvertical 'I cap;` andy now dimore paj'r'ticularly to Fig@ tberebetween.f v i -The partilQ i's `p`rovid'ed with an enlarged I cellar communieatingwithy Vthe partfll -byf'rneans or' the"registeringfpasfQ sages, 17 and 1 8,` extending through tbe'parts 12' an cll3,` whereby a lubricant' may bel acl-,-

Il 'and' 12gfmayv bedulyllubricated; 1

The grease cellar,v `16, isfiiiternallyf Q0 .Y Ararer i 70 l, of ai similar .modified o'r'm o-.tl'ie ,device','=a sf embodied for use :asianinternallylthreadedj "self-lockirrgcap,theview'foFigure'S being y f' 7a" sectional elevational andtop 4plan -viewscf a furthermodifiedv form* of the device,` as embodied Vv`;orus e fas anfe- Xternally threaded j Y 1.00 ."4 'jl mittedfagainst `the part'lll and thereby"A the contacting surfaces 11a andy 12e-fof -tlieparts 1 05 v andas 'will be app'arentn refereucetoFg-- j members, 19 and 20, the ineinberlll) includV ing, as here 'sliown., a; lowerV orrplug portion 21, externally threaded for engagement with the-part 1'6, and an elongated upper cylindrifl ,calfstem V0r spindle 22, passing thrlghflh@ *Router orrsleeve member' 20iwhijch is also eX- yengagement'y,withsaid member 16j.v 130th membersilQ Q211I1d;20 neffplvdd vwith portions suitably formedfory engageternally threaded and adapted for .threaded 1 l ment 'a fwren'ch, such portions being s -may .be imparted? ft'o- 'them manually V:asby?the employment ofja suitable wrench,

?Ifso:eon'structfandfarrangefsaidparts 19 and 20' ,that any.' relative,f rnovenienttherebetween causes yaldi st ortion :of the peripheryvof. the

" Iplug-ffornied bytheadjacentperimeters of suc-h1 partsg19 and 2 0, such ydistortion,being Ytherebyelfectedfbnfaplane transverse to the Y longitudinal axis 'of lthe; Plug; device. and an` vincrease vin the total ofA such `perimeters yand z' therefore of the transverse -are'aiof the plug device 'being similarly attained.

i' j These effects Iaccomplish in the present embodimen'tof ,my invention by arranging "the fopening. A20a jinj the sl'eelve 20L- slightly off? y center,gand{disposinggthe spindle 22 also.

r f While relative eccentrioityioff the 'opening l 120a landl agspindle 22, 'isf essential,` it rvis v also i -desirablej `that lbothjof fsufchfelements ,be 'ec- 1 ="c`entric,=relatively tothe ycenter "of -thejirmer-v 'Jthreadedportion 16A ofthegreasel cellar Y16,

invorjder thatmovement'of eithenof the" ele- Y *ments-:19 Aand 20'fmay-,cause thefdistortiony y*referred to, and Ifor Va-similar 'reason l`it is fdesirabl'e that in inserting the members 19 -V :andj201-into-, the p'lugf 1 6, that'the.adjacent 4fsurface'sf21"- a-nd 20Fof1the saidl members 19 f-Thedoubl'e ecce ntrieityfand spacing apart fr are (preferred features of v construction as ".fnicatngqtlfle movement@ 219 randffxto the Eotherftlielelf- While; lh@ 'amountjof eccentricity and spacing may vary fj safef,'guarde` againstany temdency1 of: undei sirediemoveinent of one of the ,parts-19andV Y I 20 to becomecommunicated tosthebther theneof, jether.- owingito dragging around the `b@meertheearr-surfaces 2l1u M120" commu" fion@ Ofi' Said? parts noted'that formingthe opening 20a and the `under different v'circumstances, it may :be

spindle 22, 1/32offcenter and agseparation A' i' of one thread is adequate ina plug of 3/47A outside diameter.`

each other as. shown lin Figurefl'.

The structure of themodified form yof device shown in Figure, z'of lthe drawlngsfis similar toethat of. Figures 1 to 3, save `that H in 'the device of'Figure 4,"the `co-actingt male -One of thecornersof eachlof the termi!V nals23 -and 24 is .desirably chamfered'oif to indicate' the status of the two elements 19 -en d..20-, as forming a perfect cylinder when .the chamfered portions register, as appears', .in Figure 3l` or when moved.relativelyftol and-female screw-,threads areom-ittechand f expansion and c'onseop'ientfT f rictionalv ,cont act .1s `relied upon to prevent relative movement between vthe-partsv 4,19ya and20aon the one handend theffpart- 1165 on the other hand@I such frictional Contact vbeing vproduced by* 'i ,imparting` moveinentto one .of thelpa'rts 19j'L and, 20a' without. simultaneously y'impar.t-ii'g ittothe other thereof, thereby causiiiga Vfclrstortion of :the periphery of theplug device quired fortheflocking operation,"

;Reverting now more Vp'articula'rly tofFig- `ures Brand 6 ofthedrawings and to thelocljringuiut embodyingy my present invention: il-.V ',lustrated therein, itv willl be noted- .thahsuch device includes afpair of internally ythreaded lmembe'rs 30and 31,'` gvenfasuitable exter'' v Anal contourf here shown lthereception ofa wrench.

`The:members- 30 and-Slare'also preferably threaded offfcenter 'for the reasons u e above statedJJ-and v'furtherinore ,the melfrllieriY 'Y Y l fashezia'gonal, for

thusfor1ned.. Qbviously, .the closerfthelfit Vbetween ,ther parts''.1922,andQZal on the one hand, and between then'rand'the'partllflon Y the other` hand, the slighter the relative i movement :between the4 parte 'z19f1'kland` 20v re- 30 vkis* providedwith anannular extension 32a/,alto [receive kwhich thefniember 31 lis given a somewhat largerlcounterbore, as indicated l at; 33', thus lfoiaf'ning-fa? coi-operating .extension :er thelpart el, ,'whieh www 'Seeker adapted Ao receive the extensionf'32'and ybear theregagainst; `Y f' r engagementand separation ofthe A`parts, 30

and=31 an eXpansionQringBlis disposed in a groove 35-for1ned on thefinner peripheryY ofY vthe counterb'ore 33, andv vvthe extension' 32 is; fpiortidedwvitlr van annular igroovefBG Vof,

` depthadequate tolac'compli'sh the'iing34l vunder compression in' the Vassemblage Vof the device, and of awdth i suflicr'ent tol pern'iit the desired relative axial movement ofthe parts 3 Oand31. j y e inf-practice, ity is .adequate .'forQeXalni/ple,

if 'the Socket Se of the part 31 ora eff/ leek i ingrnut )dev ice,y be made of ya 2N2/ inside diameter and the extension of the 'part 30 I n orderto"preventaccidentalftotal disllfr i thereof be made of a .215/32v outside dia meter with the centersof the openings4 38 andy 39 of the parts, 3l and 31. somef3/64f '0E-center, which will insure that a' slight turn given to either of the parts 30 or 3l will not only lock such parts against relative movement, but so distort the periphery of the inner threaded portions thereof asv toV cause the device to bind on the threads of the pipe,

' Oninspection of Figures? and 8 ofthe drawings, it willV be'perceivedthat the ,de-7'* vice here shown vis similar to that of .Figures 15l bolt, shaft, orl tlie'like with Awhich the device is employed.r

5`and Gsave that it is modified lfor closing the end of a pipe bytheprovisionof aclosed terminal on the, member 30a, `(as indicated at 40,) 'co-acting with the members 3la and 34a.

In the modiiied device of Figures 9V et seq. it will be observed that. I here'again employ an vinternally threaded grease cellar 16c whichmay bevattachedto the partv to'bel lubricated byy a threaded nipple`41`, having ahead, 42, by meansrot which-fthenippley y '41,3 may -be turned into the cellar 16C.Vv

`Here too, theparts l9iandi20.are-,farev ranged .oiicentenbut the parts 19Claiid2lc y instead of beingV formed rintegrally .as vthe y'correspending' parts 19 andQQlin thejdef vicesof Figures l to 4.aie Ahere separate.

Lparts. The spindle, l9,.is formed with a A-reduc'ed end, 43, anda Vflattened portiony adapted to beaifa'gainsta complementarily. I; l flattened portion on the part 21, as indi-*yV 'catedz'it44`, (thereby preventing relative movement betweenV the' 4parts 19 and 210.

" 'j when the part 19c is turned upon the application of a wrench to the headf23,) andV y the lower vend of the part 43 may be peened." over to form a rivet-headas indicated atv 45. ln the present embodiment 'of my ini vention, the sleeve portion, 46'is Providedv with an annular marginal extension which` serves a twofold purpose of forming `a stop for limiting the inward movement of the cap, and also to protect the adjacent threads from injury. r. i Y

lt will be appreciated byV those who are skilledl in the art, that the dimensions of the several' elements may be readily `varied to accommodate Vthe various. devices.Av for uses in ydierent situations.

Havingthus described my invention and fwillustrated its'use, what 'I claim as'new andv desir-e to secure byLetters Patent is` j l.` In Va device ofthe character, described, Vin combination, a pair of separate elements phaving",complementally threaded portions .or'simultaneons engagement with an object,

elements being adapted to operate in. unison,` saidV elements also havingeccentric @alined axes, the elements normallyfbeing relatively spaced when looked, one of the desired position in' `velements comprising ltwo lseparate but relaftively immovable parts,` the said separate` A. t elements being yadapted-:to `bind `laterally v when relatively moved.

2.y In-adevicefof he character described,'V 70 having; complementally -threadedfportions l for simultaneous management with anjob?V Y' ject, said elementsbe'ing adapted to operatev incoinbinatioma pair of separate 'elements in unison, saidvelements also having eccen-- tric alined aXes, e the'` elements normally be?v ing relatively spacediwhenklocked, ,oneot said elements comprising two` separate 'but relatively immovable parts, one of said parts elements,l and said elements .being adapted to tively moved. 3. 'In a'devi which fextends fa Y shank passing throught, the othenmember, said shank havingl relatively'V offset, portions eccentric to the respective member .v'vithinff vwhich they'lie, said movablemembersihavj, mgcomplemental surface engaging portionsv f f "forming the threaded portionof one of the, j

becomeeccentrically displaed `When* rela-1 Y e as speciiied,v in combination', 3l two (relatively, movable members,A one of which comprises a threaded part from*A relatively; immovable and adapted forfope'ration in unisoml but becoming relatively displaced on the [shank i' upon-relative movement of said members.

i 4. In a {locking device, an internally.:

threaded element, two relatively movable elements -eXternallyfand 'complementally threaded in normal spaced relationi and envr l gaging the threads` of thev stationary ele-l 1 ment, one `of said movable eleinents having` n Y an eccentric projection lying eccentrically Il "within, the other1` of said movable..eleme i'its,f; Y, fj4 sov that said latter .elementsare freely` Open 1 able'fonlyas a unit Aon said'stationary ele-l ment, means onV said eccentric projection Vfor facilitating unit operation of said fmovable elements and for preventing ytheir complete separation, andfrelative."operationiot said f movable elements .causing a relatively eccentric ldisplacement of the elements.

cally within the other. ofsaid elements, andV `a projecting portion on saidprojection co` operating withvr the other movablefelement nitiinvfvissnaiive,

for permitting operation of theelementsas va unit and preventing their ,completeseparation*V j --i "t ',In testimony whereof lI have hereuntojlz signed my name, 1* 1 l 

